iac/ansible/README.md
Sergei Poljanski e76d2a022c docs: describe the servers as they are
The READMEs still tracked the 2025 migration from bare metal and listed
Grafana, Immich, Valheim, Prosody and others that do not run. Replace
them with what is deployed, how a change reaches production and where
the secrets live.

Assisted-by: Claude:fable-5-2
2026-11-12 06:47:09 +04:00

86 lines
3.1 KiB
Markdown

# Ansible
`site.yaml` is the desired state of both servers and is applied by the
deploy pipeline on every push to `main`. The playbooks under
`playbooks/` are host bootstrap and are run by hand.
## Running
```sh
echo '<vault password>' > .vault_pass && chmod 600 .vault_pass
ansible-playbook site.yaml --check --diff # dry run, over WireGuard
ansible-playbook site.yaml # apply
ansible-playbook site.yaml --tags forgejo # one role
```
On NixOS: `nix shell nixpkgs#ansible -c ansible-playbook …`.
Templates that carry secrets are never shown in `--diff` output.
## Inventories
- `inventory/hosts.yaml`: default. Connects as root to the WireGuard
addresses.
- `inventory/ci.yaml`: used by the pipeline. Connects as `deploy` over
the private network, reaching asxpio-services through asxpio-ops.
`known_hosts` pins both servers' SSH host keys for the pipeline.
## Variables
```
inventory/
├── group_vars/all/
│ ├── network.yaml # VPC and WireGuard addresses
│ ├── paths.yaml # /opt
│ ├── s3.yaml # object storage buckets and s3fs mounts
│ ├── wireguard.yaml # WireGuard peers
│ └── vault.yaml # encrypted secrets
├── group_vars/ops_servers/
│ ├── traefik.yaml # traefik_version
│ └── forgejo.yaml # forgejo_version, domain and aliases
├── group_vars/services_servers/
│ ├── forgejo_runner.yaml # runner version, labels' nix image
│ └── minecraft.yaml
└── host_vars/ # per-host addresses, SSH and s3fs settings
```
Compose files without variables are plain files under
`roles/<role>/files/`; edit the image tag there.
## Roles in site.yaml
`base`, `traefik`, `crawler_alert`, `forgejo`, `forgejo_runner`,
`sillytavern`, `minecraft`, `minecraft_fossils`. Service roles go
through `docker_service`, which writes the files, runs
`docker compose up -d`, restarts on a config change and waits for the
service to answer.
`crawler_alert` installs a copy of
[traefik-crawlers-statistics](https://git.asxp.io/asxpi/traefik-crawlers-statistics);
update `roles/crawler_alert/files/` from there.
## Bootstrap playbooks
| Playbook | Purpose |
|----------|---------|
| `01-wireguard-setup.yaml` | WireGuard hub on asxpio-ops, peer on asxpio-services, client configs |
| `02-ssh-hardening.yaml` | restrict SSH to WireGuard and the private network |
| `03-setup-s3fs.yaml` | s3fs mounts on asxpio-services (off on asxpio-ops) |
| `04-add-user-zerrtika.yaml` | add a user to running servers |
| `05-swap.yaml` | 2 GB swapfile on asxpio-ops |
Always dry-run these first with `--check --diff`.
- `03-setup-s3fs.yaml` rewrites `/etc/s3fs/.passwd-s3fs`, which the
backup script on asxpio-ops also reads.
- On asxpio-services the WireGuard interface is named
`asxpio-services`, not `wg0`. Check `01-wireguard-setup.yaml` against
the host before re-running it there.
## Runner notes
The `nix-latest` label runs `nixos/nix:<forgejo_runner_nix_version>`
with a `nix-store-<version>` volume over `/nix`. To bump it: change the
variable, let the pipeline apply it, then remove the old volume.